Building Buffers
Prepare for the unexpected by adding margin to everything you plan.
Building Buffers is the practice of deliberately adding time, resource, and capacity margins to your plans to absorb the inevitable unexpected. McKeown argues that the only thing we can predict with certainty is that the unexpected will happen, so the Essentialist builds buffers to prevent two things from crashing into each other.
The framework directly counters the planning fallacy, the well-documented tendency to underestimate how long tasks will take. McKeown recommends adding 50% to your time estimate for any task. If you think something will take two hours, schedule three. This is not pessimism; it is realistic preparation that turns unexpected problems from crises into minor adjustments.
The analogy McKeown uses with his children is driving: the only way to avoid crashing is to maintain space between your car and the car in front of you. This buffer gives you time to respond and adapt. Similarly, buffer time between meetings, buffer resources in budgets, and buffer energy in your schedule give you the capacity to handle whatever comes without your entire system breaking down.
- The only certainty in any plan is that the unexpected will arrive, so the only rational response is to build margin into everything.
- Adding fifty percent to any time estimate is not pessimism but an accurate correction for the planning fallacy.
- Slack is not waste; it is the capacity that turns crises into manageable adjustments.
- Systems without buffers are brittle, and brittle systems fail at exactly the moment when resilience is most needed.
- Buffer time between commitments preserves the cognitive space needed to do each one well.
- Identify Your Biggest Planning AssumptionsFor your most important projects and commitments, list the assumptions you are making about how smoothly things will go. These are your vulnerability points. What are you assuming about timelines, resources, and cooperation that might not hold?
- Add 50% to Every Time EstimateTake your honest estimate for how long a task will take and add 50%. If you think a presentation will take four hours to prepare, block six. This single practice eliminates most deadline stress and gives you room to absorb the unexpected.
- Prepare for the Scenario You Hope Will Not HappenAsk 'What could go wrong?' and prepare a contingency. This is not about being negative; it is about being realistic. The best time to plan your response to a problem is before the problem occurs, when you can think clearly and calmly.
- Build Transition Time Between CommitmentsNever schedule commitments back to back. Leave buffer time between meetings, between projects, and between work and personal time. This transition space prevents cascading delays where one overrun ruins the rest of your day.
In the biblical story, Joseph interpreted the Pharaoh's dream about seven fat cows followed by seven lean cows as a prophecy of seven years of plenty followed by seven years of famine. He advised storing a fifth of the harvest each year as a buffer.
Building Buffers is the practice of deliberately adding time, resource, and capacity margins to your plans to absorb the inevitable unexpected. McKeown argues that the only thing we can predict with certainty is that the unexpected will happen, so the Essentialist builds buffers to prevent two things from crashing into each other.
The framework directly counters the planning fallacy, the well-documented tendency to underestimate how long tasks will take. McKeown recommends adding 50% to your ti